A 36W LED transformer/driver is perfect for use with all 12 volt LED lighting and strip lights.You will need one dedicated transformer/driver for each bulb just like a 12V halogen system unless your electrician wires your lights to a central,bigger transformer/driver and then you can use for example 9 x 4 watt bulbs with the one transformer
Although your LED lights may work fine if operated through a standard 12v transformer, we would always recommend that you use an LED compatible one which is fit for purpose in order to ensure that you are not risking the life span of your LED lights. Sometimes a standard 12v transformer will work ok however we would always recommend getting the correct driver to match your lights.